成唯識論演祕 6.351

6.351

此因三性《瑜伽論》云：地雨等緣能生於芽。又近不善士，聞不正法，非理作意及先串習所引勢力生無明等。又親近善士，聽聞正法，如理作意及先所作諸根成就，如次無記、染、善三性攝受因也。

Regarding the three moral natures of this cause, the Yogācārabhūmi states: conditions such as the earth, rain, and so forth can produce a sprout. Furthermore, associating with improper companions, hearing improper teachings, unmethodical attention (ayoniśo-manaskāra), and the force induced by prior habitual practice produce ignorance and so forth. Furthermore, associating with virtuous companions, hearing the true Dharma, methodical attention (yoniśo-manaskāra), and the accomplishment of the faculties created previously—these are the accepting causes of the three natures: indeterminate, defiled, and wholesome, respectively.